Matplotlib-向下移动X轴标签，但不向下移动X轴刻度

我正在使用Matplotlib绘制直方图. 使用上一个问题的提示: Matplotlib-为每个垃圾箱贴标签， 我或多或少地努力了.

I'm using Matplotlib to plot a histogram. Using tips from my previous question: Matplotlib - label each bin, I've more or less go the kinks worked out.

最后一个问题-以前-在x轴刻度线(0.00、0.04、0.08、0.12等)下方显示了x轴标签(时间(以毫秒为单位)")

There's one final issue - previously - the x-axis label ("Time (in milliseconds)") was being rendered underneath the x-axis tickmarks (0.00, 0.04, 0.08, 0.12 etc.)

根据乔·金斯顿(Joe Kingston)的建议(请参阅上面的问题)，我尝试使用:

Using the advice from Joe Kingston (see question above), I tried using:

ax.tick_params(axis='x', pad=30)

但是，这会同时移动x轴刻度线(0.00、0.04、0.08、0.12等)以及x轴标签(时间(以毫秒为单位)"):

However, this moves both the x-axis tickmarks (0.00, 0.04, 0.08, 0.12 etc.), as well as the x-axis label ("Time (in milliseconds)"):

有什么办法只能将x轴标签移动到三行图形的下面吗?

Is there any way to move only the x-axis label to underneath the three rows of figures?

Nb:您可能需要直接打开下面的PNG-右键单击图像，然后单击查看图像"(以FF键)或在新标签页中打开图像"(Chrome).由SO完成的图像调整大小使它们几乎不可读